Automatic die-grinder.



J. H. MURCH.

AUTOMATIC DIE GRINDER.

APPLICATION FILED'MAR-B, 1911.

Patented Dec. 30, 1919.

'2 SHEETS-SHEET 1.

hTToRNEW HUI! WITNESS. f zd-yzww J. H. MURCH.

AUIOMAHC DIE GRINDER.

APPLICATEON mu) MAE-8. 1911.

Patented Dec. 30,1919.

2 SHEETS -SHEET 2.

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W Cm W] TNESS I UNITED STATES PATENT OFFICE.

JOHN H. MURCH, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO AMERICAN CAN COMPANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF NEW JERSEY.

AUTOMATIC DIE-GRIIYDER.

Specification of Letters Patent.

Patented Dec. 30, 1919.

Application filed March 8, 1917. Serial No. 153,341.

To all whom it may concern:

Be it known that I, JOHN H. MURoH,'a citizen of the United States, residing at the city and county of San Francisco and State of California, have invented certain new and useful Improvements in Automatic Die- Grinders, of which the following is a specification.

The present invention relates to grinding machines, and more particularly to a machine for automatically grinding the annular dies used in can-making machinery for the stamping of can end blanks.

The object of the invention is to provide a machine for the described purpose, by means of which an annular die may be automatically ground to the desired form, and in which the grinding means are mounted for universal adjustment relative to the die holding means.

In order to comprehend the invention, reference should be had to the accompanyingl sheets of drawings, in which:

igure 1 is a partly broken perspective View of the machine embodying my invention.

Fig. 2, is a detailed transverse section taken, in the direction of the arrows, in a plane represented by the line 2-2 of Fig. 1;

Fig. 3, is a section taken in the direction of the arrows in a plane represented by the line 3-3 of Fig. 1;

Fig. 4, is a vertical section taken in the direction of the arrows in a plane represented by the line 44 of Fig. 3, showing the grinding wheel holder elevated to its inoperative position.

In the drawings, the reference numeral 1 designates a suitably constructed base, upon which is mounted a horizontal bed-plate or table 2. Rising from the table 2, at the rear corners thereof, are vertically disposed brackets 3 and 4, Figs. 1 and 4 of the drawings. A transverse member 5 is pivotally connected at one end with the bracket 3, at 3 and is adapted to be rcmovably secured, as by means of a bolt 4, Fig. 1, at its other end to the bracket 4. Said transverse member thus forms norm-ally a bridge across the upper ends of the two vertical brackets 3 and 4, and may be elevated to the position shown in Fig. 4 of the drawings.

The transverse member 5 carries the grinding head. This head comprises a block 6, Figs. 1, 2 and 3 of the drawings,

which is secured to the transversemember 5 for lineal sliding movement, by means of a clamping yoke 7 The latter has a lug 8 projecting from its inner surface and'lywithin the channel portion of the transverse member 5. A lineally disposed screw 9, Figs. 2, 3 and 4 of the drawings, is rotatably carried at 10, Fig. 4, of the drawings, in the end of the transverse member 5, and is screwed through the lug 8 carried by the yoke 7 of the grinding head, so that by the rotation of said' screw 9, said head may be moved lineally with respect to the trans verse member 5. A hand wheel 11 is provided "at the outer end of the screw 9 for the operation thereof.

The member 6 of the grinding head is provided with vertically disposed guideways 12, Flgs. 1, 2 and 3 of the drawings, and within said guide-ways is carried a vertically slidable'block 13. Said block 13 has a rearward'ly projecting lug 14, Fig. 12,

Y which is internally threaded, and through which passes a vertically disposed screw 15, said screw being rotatably carried, at 16, in the upper portion of the head member 6,

and being provided with a hand-wheel 17. 1

Thus bythe operation of said hand wheel the block 13 may be moved vertically with respect to the head member 6.

The block 13 carries a forwardly'projecting bracket 18, Figs. 1, 2 and 3 of the drawings, in which is journaled the grinder spindle 19. Said spindle carries a grinder wheel 20 on its forward end, and a pulley 21 on its rear end. A belt 22, Figs. 1, 3 and 4, passes over said pulley 21 and transmits power to the grinder spindle from a source not shown in the drawings. Said belt is so disposed as to be under the desired driving tension when the transverse member 5 is in its operative position, as shown in Figs. 1 and 3 of the drawings.

The bed-plate 2 carries a vertically dis posed cylindrical journal bearing member 23, Fig. 3 of the drawings, in the lower portion of which is rotatably carried a spindle 24, having on its lower end a bevel the latter being adapted to mesh with, and be driven by a similar gear 26, carried by the inner end of a drive shaft 27, journaled in the frame 1 at 28'. A pulley 29, is preferably provided upon the outer end of the drive shaft 27, for receiving power from an outside source, not shown in the drawings.

gear 25,

The upper end of the spindle 24 is hollow,

and is provided with alineally disposed keyway 30. A shaft 31 is carried within the upper portion'of the journal member 23, and is adapted for rotary and axial movement' therein. The lower end 32 of said shaft is adapted to fit within the hollow upper end of the spindle 24, and is provided with a key 33, adapted for engagement with the key-Way-30 of said spindle, so that ,ro-

v tary motion is transmitted from the spindle 24 to the shaft 31, but said shaft is permitted to have axial movement within the journal member 23 and the upper end of said spindle.

The shaft 31 carries a horizontally disposed chuck 34, Figs. 1, 3 and 4 of the drawin s u on which is removabl secured as by means of clamps 35, a die holding plate 36. The die 37', which is to beground, is

shown as resting partially within said die holding plate, and secured thereto by means of a removable annular collar 38. Secured to the underside of the chuck 34 is a cam member 39, having its lower face adapted to rest upon a roller 40, rotatably carried by a fixed bracket 41, extending upwardly and secured to the'bed-plate. The said lower face of the cam 39 is formed with the contour desired for the ground face 42 of the die 37 I Therefore, as the chuck 34, carrying said die, is rotated by the described, mechanism, said chuck will be moved axially by the action of the cam 39 and its roller 40 to produce upon the face of the die a contour: of the desired form.

It will be readily understood that the transverse member 5, carrying the grinderhead, may be elevated as shown in Fig. 4 of the drawings, to permit the die to be placed upon the chuck and removed therefrom, Said die having been secured in place, the transverse member 5 is then. returned to the position shown in Figs. 1 and 3 of the drawings and the grinder wheel is adjusted to the proper position, laterally, and vertically, by means of th'e'hand wheels 11 and 17, re-

spectively. The chuck is then caused to ro- 7 is claimed as new and desired to be protected by Letters Patent is 1. The combination of a rotary work holding chuck axially slidable toward and from the cuttin element, 'a' rotary driving spindle there or slid-ably connected with said as chuck, means for reciprocating said chuck axially while, it is rotating, a rotary cutting element the cutting face of which is presented toward the end of the said chuck at a point distant from the axis of the chuck to operate -on the end of an annular die which is secured to the chuck, and power means for rotating said chuck and cutting element together.

2. In a grinding machine, the combination of a vertically and axially movable chuck, means for rotating said chuck, means for moving the chuck axially, a pivoted and movable bar near said chuck, a bearing for a grinding tool, adjusting slides which are respectively vertically movable and horizontally movable, connecting said bearing with said bar, and means for holding the free end of the bar to hold the grinder in operative position, said bar being swingable to remove the grinder from in frontof the tool and chuck.

3. A machine for the described purpose comprising grinding means adjustable in two directions, devices for holding the grinding means in fixed position, means for holding the work to be ground, and devices for automatically and constantly rotating and reciprocating said workiholding means, to cause the work to be ground to a predetermined form.

. 4. A machine for the described purpose comprising grinding means, devices for holding the grinding means in fixed position, a

horizontally rotatable and axially movable chuck constantly operating in connection with said grlnding means for contmuously holding the work to be ground, mechanism for rotating said chuck, and devices for automaticallyanoving said chuck axially, to cause' the workto be ground to a predeterminedform. r

5. A machine for the described purpose comprising grinding means, devices for holding the grinding means in fixed position, a horizontally rotatable and axially movable chuck adapted to hold the work to be ground, me cha'nism for rotating said chuck continuously together with said grinding means, a cam carried by said chuck, and a cam follower adapted for coiiperation there- 116 with, said cam being adapted to impart axial movement to said chuck during the rotation thereof.

6. A machine for the described purpose, comprising grinding means, a horizontally 120 by the under-side of said chuck, and a cam 126 follower upon which said cam is adapted to ride to impart axial movement to said chuck durin the rotation thereof,

7 1% machine for the described purpose,

comprising a rotatable and axially movable 130' tion with the Work, devices for holding the grinding means in fixed relation to the work during the axial movement of the chuckfand means at will for moving said grinding means away and" upward from said chuck to enable the work to be placed thereon and re-' moved therefrom.

8. A machine for the described purpose comprising a horizontally disposed bed-plate, a horizontally rotatable and axially movable chuck supported by said bed-plate and adapted to hold the work to be ground, mecha: nism for rotating said chuck devices for automatically moving said chuck axially during the rotation thereof, a pair of fixed brackets extending upwardly from said bed-plate, a transverse member plvotally secured to one of said brackets and removably secured to the other, a grinder-head carried by said transverse member, means foradjusting said grinder-head horizontally and vertically, and grinding means carried by said head in grinding relation with the Work.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

J ()HN'H. MUROHI 'lVitnesses:

' N. A. AcKER,

D. B. RICHARDS. 

